Polishing and buffing machine.



J. F. GAIL.

POLISHING AND BUFFING MACHINE.

APPLICATiON FILED JUNE 22, 1914.

1, 176,139. Patented Mar. 21,1916.

3 SHEETS-SHEET I- THE COLUMBIA Puqwasuwu co., WASHINGTON, D. C.

J. F. GAIL.

POLISHING AND BUFFING MACHINE.

APPLICATION FILED JUNE 22. 1914.

1 1 76, 1 3 9 Patented Mar. 21, 1916.

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J. F. GAIL.

POLISHING AND BUFFING MACHINE.

APPLICATION FILED JUNE 22. 1914. 1,176,139. Patented Mar. 21, 1916.

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Patented Mar. 21, 1916.

J. F. GAIL.

POLISHING AND BUFFING MACHINE.

APPLICATION FILED JUNE 22. I914.

J. F. GA'IL POLISHING AND BUFFING MACHINE.

APPLICATION FILED JUNE 22. 1914.

8 SHEETS-SHEET 5.

Patented Mar. 21, 1916.

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J. F. GAIL. POLISHING AND'BUF.F|NG MACHINE.

' APPLICATION FILED JUNE 22, I9I4- 1,176,139. Patented Mar. 2]., 1916.

8 SHEETSSHEET 6.

THE COLUMBIA PLANOGRAPH 60-, WASHINGTON. D. a.

J. F. GAIL.

POLISHING AND BUFFING MACHINE.

APPLICATION FILED JUNE 22. 1914.

l 176,1 39. Patented Mar. 21, 1916.

8 SHEETSSHEET 7.

J. F. GAIL,

POLISHING AND BUFFING MACHINE.

APPLVICATION FILED JUNE 22, I914- Patented Mar. 21, 1916.

8 SHEETSSHEET 8 m8 COLUMBIA PLANOURAPH 50., WASHINGTON. D c.

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JOHN F. GAIL, OIE KENOSHA, WISCONSIN.

POLISHING AND BUFFING MACHINE.

Application filed June 22, 1914.

T 0 all whom 2'15 may concern:

Be it known that 1, JOHN F. GAIL, a citizen of the United States, residing in the city of Kenosha, county of Kenosha, and State of lVisconsin, have invented certain new and useful Improvements in Polishing and Buffing Machines, of which the following is a specification.

This invention relates to improvements in polishing and buffing machines and refers more particularly to a machine which is used for polishing and buffing brass tubing such as is used in brass beds or other metal furniture and the like, the polishing and bufling being accomplished by the same machine without removal of the tubes.

Among the salient objects of the invention are to provide a construction in which aseries of tubes is simultaneously and automatically polished and buffed at the same setting of the machine, the machine being so organized as to insure a uniform polishing and buffing of the respective tubes; to provide in a construction of the character referred to im roved means for supporting and reciprocating the tubes back and forth beneath a revolving polishing wheel for a given number of reci rocations, and then reciprocating them back and forth beneath a bufling wheel for a given number of reciprocations, during each of which operations the tubes are intermittently rotated on their axes during predetermined points in the travel of said carriage; to provide means for rendering the polishing wheel temporarily inoperative during said rotary movement in order to prevent scratching of the surface of the tubes, to provide a construction in which both the polishing wheel and the bufiing wheel are given a slight lateral move ment across the objects being polished in order to prevent local wear of the polishing and buffing wheels and to present different surfaces of the latter to the work being operated upon; to provide a construction in which the polishing and buffing operation is entirely automatic from the time the machine is started until the successive polishing and bufiing operations are completed, and in which the machine is automatically stopped when the operations are completed, and in a position to facilitate removal of the completed tubes and the insertion of a fresh supply; to provide an improved and novel mechanism for simultaneously rotating all Specification of Letters Patent.

Patented Mar. 21, 1916.

Serial No. 846,470.

of the tubes being operated upon by either wheel and means for arresting the rotation of the tubes after they have been rotated under each wheel for a predetermined number of revolutions; to provide a construction 1n which a polishing wheel and a bufling wheel are employed, the polishing wheel being provided with abradant applying mechanism which feeds a definite amount of abrasive material to the polishing wheel during the time that the polishing wheel is operating upon the tubes, and which feed mechanism is automatically rendered inoperative as soon as the tubes are transferred from the field of the polishing wheel to the field of the bufling wheel; to provide a construction in which the number of reciprocations of the tubes beneath each wheel can be altered at will by effecting slight changes in minor mechanical parts of the machine, and in which the machine is made adjustable for various lengths and sizes of tubes to be polished, and in general to provide an improved construction of the character referred to.

The invention consists in the matters hereinafter described and more particularly pointed out in the appended claims.

In the drawings, Figure 1 is a front side elevation of my improved polishing and bufling machine with parts shown broken away in order to reduce the size of the drawing, and having certain details omitted for the sake of clearness; Fig. 52- is a view similar to Fig. 1 on an enlarged scale with the ends of the machine broken away; Fig. 3 is an enlarged end elevation taken from the right hand end of Fig. 1, with parts broken away and other parts shown in section to bring out the details of construction; Fig. 4 is a fragmentary top plan view of the central part of the machine, the polishing wheels and carriage being shown removed in order to bring outthe details of the reciprocating mechanism; Fig. 5 is an enlarged top plan View of part of the machine, the polishing wheels being shown removed for the sake of clearness, showing the left hand or head stock end of the reciprocatory carriage; Fig. 6 is fragmentary plan view of the tail stock or right hand end of the reciprocatory carriage and right hand end of the supporting frame; Fig. 7 is an enlarged sectional view taken from the right hand end of the machine showing some of the details of the reciprocating and carriage traversing mecha-' nism; Fig. 8 is anelevation of the head stock end of the carriage taken from the left hand side of the machine; Fig. 9 is a detailed view of the abradant holder; Fig. 10 is a plan view of the holder shown in Fig. 9; Fig. 11 is a detailed view of the mechanism used to prevent feed of the abradant material to the polishing wheel while the butfing wheel is operating; Fig. 12 is an elevation view of the catch lever which releases the'traverse mechanism for the head and tail stocks.

Referring to the drawings, 1 designates the main standard and 2 and 3 the end supports for the frame. On the standards 2 and 3 are mounted av pair ofparallel longitudinally extending rods 4 and 5 whichprovide a track for the reciprocating carriage. The latter consists of two end castings 6 and 7 suitably bored out to receive the track rods 4:

and 5 the portion of the rods between the two end castings being covered by a sheath 8 fastened to the two end castings to prevent abradant material or other dirt from ruining the surface of the track rodse and 5. In the upper portion of the two castings '6 and 7 is journaled a rod 9 which extends the entire length of the carriage and carries the head and tail stock mechanisms. The head stock mechanism comprises a main casting 10 which is arranged to slide in the member 11, the inner end of which is rigidly connected to the rod 9 and is thus adapted to swing with the latter. On the other end of the rod 9 is firmly fixed the member 12, as shown in Fig. 6, which is also provided with a suitable slide for the tail stock casting 13. It

7 will thus be seen that the two castings 11 and 12, carrying the head and tail stocks, swing together with the rod 9 j ournaled in the end castings 6 and 7. The two end castings 6 and 7 are connected together by a rack 14, the teeth of which extend almost the entire distance between the two end castings. v

The reciprocating mechanism for the carriage will now be described. Referring to Fig. 3, 15 is a shaft suitably j ournaled in the back part of the main frame of the machine and upon which are keyed the pinion 16 and the belt pulley 17. The pinion 16 is arranged to gear with the large spur wheel 18 which drives the pinion 19 through the shaft 20, i

which is also journaled in the main frame of the machine. It will thus be seen that rotation of the shaft 15 will reciprocate the carriage by means of the rack member 14: which is rigidly connected to the two end castings of the carriage, and the direction of reciprocation will depend upon'the direction of rotation of the shaft 15. Loosely mounted on the shaft 15 are the two belt pulleys 21 and 22 which are driven. in opposite directions from a suitable source. of power by straight belt 23 and the cross belt 24E. The belt shifting mechanism for changing the direction of reciprocation of the carriage is shown in Figs. 3 and 1-. Upon the main frame of the machine I provide a suitable extension member 25 which has a track adapted to receive a slide member 26 which carries the fork member 27 through which pass the two opposite sides of the two belts. In the slide 26 is-fixed a pin 27 which is engaged by a belt crank lever 28 suitably pivoted upon an extension of the casting 25 at 29. The slide 26 is cut out at its sides to form three pairs of semicircular notches 30 which are engaged by a pairvof rollers 31 carried by a couple of opposed jointed arms 32 which are pulled together by means of a suitable spring not shown. These notches serve the purpose of preventing false movements of the shifter mechanism caused by mechanical irregularities or undue vibration while the carriage is being reciprocated.

. Referring now to thecontrol mechanism for the belt shifter, in suitable-bearings upon the main frame of the machine is slidably and rotatably mounted a control shaft 33 which carries a downwardly extending member 34, shown dotted in Fig.5, the edge just being visible in the fork of the free end of the belt crank lever 28. It will thus be seen that as long as the shaft 33 remains in the axial position shown in Figs. 5 and 7 V the downwardly extending member 3% will engage the end of the belt shifting lever 28 and operate the belt shifter mechanism. The member 34: is held in the notch of the lever 28 by means of a spring 35 which is furnished with a stop 36 preventing its too close approach to the lever 28 when the member 34 is removed out of the notch, as will hereinafter, appear. The rod 33 is moved longitudinally a sufficient distance at the end of each reciprocation of the carriage to shift the belts through the agency of a block 37 which is firmly attached to the rod 33. Assuming the carriage to be'in mo- 1 tion from left to right of the machine, after the carriage has reached the desired limit of travel to the right a block 38 firmly attached to the rod 9 which travels with the carriage strikes the block37 on the control rod 33 which pulls over the belt shiftinglever 28 which is operated on by the member 34: in engagement with the notch referred to. The direction of reciprocation of the'carriage will thus be changed in an obvious manner and it will commence to travel in the other direction, that is, from right to left. When the desired limit of travel is approached in this direction the block 37 will be struck upon its righthand side by the properly in engagement therewith.

the rod 33 remains in the position shown with the member 34 in the notch at the end of the belt shifting lever.

The polishing wheels and 41 are mounted side by side upon the shaft 42 journaled in the column 43 and driven through a pulley 44 from a suitable source of power. The shaft 42 is arranged to slide a certain amount in its journals to allow for a slight endwise reciprocation provided to allow for changing the wearing zones of'the buffing and polishing wheels. In the bottom portion of the column 43 is slidably mounted a shaft 45 which carries an arm 46, the upper end of which is bored out to receive the shaft and fitting between the collars 47 rigidly secured on said shaft. To a boss on the member 45 is attached the tension spring 48, the other end of which is firmly secured to a fixed part of the main frame of the machine. The end of the shaft 45 butts up against the T-shaped slide 49, which is reciprocated back and forth by a cam mechanism driven by a separate belt and pulley 50, which is fixed to a worm shaft 51, which drives the heart shaped cam 52 in an obvious manner. It should here be noted that the rotation of the polishing and buffing wheels and the reciprocation of the shaft carrying them through the cam mechanism just described is continuous as long as the machine is operating, and is not in any way controlled by the belt shifting mechanism or any of the other auxiliary control apparatus.

Describing the tube mounting arrangement, referring to Fig. 5, 53 represents a plurality of, in this case four, headstock spindles mounted to rotate in the casting 10 and arranged to drive each other through the small pinions 54. The ends of the spindles are furnished with centers 55 which are of the proper degree of taper to enter and fit the bushings 56 in the ends of the tubes 57 and positively rotate the latter. The other ends of the tubes 57 are carried by similar spindles 58 in the tail-stock casting 13 (see Fig. 6). In this case. however, the spindles 58 are not arranged to be positively rotated. Referring to Fig. 6 it will be seen that each spindle 58 is reduced in diameter for the major portion of its length to admit the insertion of a coiled spring 59 in the space between the reduced portion of the spindle and the bored out hole in the casting 13. The effect of this coiled spring is to apply a considerable amount of pressure to the tube centers and hold the tubes The release of the tail-stock spindles 58 when the tubes are finished, is accomplished b means of a pair of upstanding levers 60 which are pivoted on a downwardly extending bracket 61 firmly attached to the under side of the member 13, as shown in Figs. 1 and 3. The

upper ends of these levers are bent away from each other to render them more accessible. It is obvious that when one of the levers 60 is moved longitudinally of the spindles 58 in an outwardly direction it will engage the heads 62 on the ends of the spindles and the pair of tubes controlled by that lever will be released from the centers. The adjustment of the tail-stock for various lengths of tubes is accomplished by means of the handle 63 which clamps the member 12 rigidly upon the rod 9, the upper portion of the member 12 which fits over the rod 9 being split to allow for this clamping effect, as shown in Fig. 3.

Describing now the mechanism for rotating the tubes, referring to Fig. 5 it will be seen that the casting 11 has a pair of arms projecting to the right of the headstock in which is journaled a shaft 64, to one end of which is firmly attached a block 65 and also carrying a member 66 extending between the two arms of the casting 11 just referred to. As long as the two members 65 and 66 are rigidly attached to the shaft 64 partial rotation of the member 65 will cause a corresponding partial rotation of the member 66. As shown in Figs. 5 and 8, member 65 is arranged to engage a cam surface on the end of the slide 67 which is firmly attached to the main frame of the machine and is so placed that the member 65 will strike the cam surface 68 when the carriage is approaching the limit of its travel toward the right hand side of the machine. The shaft 64 will thus be partially rotated every time the carriage undergoes a complete back and forth reciprocation. lVhen the member 66 is partially rotated it depresses slightly the pin 69 carried by the pivoted plate 70 which rotates one of the spindles 53 through the agency of the pawl 71 and the ratchet wheel 72 which is firmly fixed to the spindle 53. The cam plate 70 is retracted by the tension spring 7 3 which also, through the pin 69, lifts the member 66, undue rotation of which is prevented by the stop member 74 fixed to the arm, of the main casting 11. Owing to the fact that the member 66 eX- tends for a sufficient distance parallel with the head-stock slide it will rotate the tubes independently of the position of the headstock casting 10 which is arranged to slide transversely across the casting 11, as will hereinafter appear. Referring to Figs. 3, 6 and 7. it will be seen that the head-stock and tail-stock are provided with parallel racks 75 firmly attached to their under sides and projecting through the opening of the slide in the castings 11 and 12. In the two end castings of the carriage, 6 and 7. is journaled a shaft 76 extending the entire length of the carriage and arranged to r0- tate therein. The right hand end of the mounted a fixed shaft 83 upon which rotate rod 7 6 has fixed to it a collar 77 which is engaged by a strong spiral spring 78, the other end of which is fixed to the casting The spring 78 is arranged to be wound up to its fullest extent when the head and tail-stocks are pushed in toward the frame of the machine and the tubes are being operated upon by the polishing wheel 40, the winding up of the spring being "accomplished by the pinions 79 firmly keyed to the shaft 76 and engaging the racks on the under sides of the head and tailestocks. The effect of the spring 78 is thus always to tend'to rotate the pinions 79 in the di rection such as to cause the head-stock and tail 'stock to move outwardly from the field of the polishing-wheel 40 into the field of the buffing wheel 41. While the tubes are being operated upon by the polishing Wheel this tendency of the stocks to move outwardly is prevented by a T-shaped control 7 lever '80 which is loosely pivoted upon the shaft '9. I 7 80 is notched to engage a hook member 81 The outward end of this lever which is fastened to "the head-stock casting 11, a detailed view of thisbeing shown in Fig. 12. The lever 80 is raised and held up in engagement with the member 81 by a spring 82. The T-shaped ends of the lever 80 are dagger shaped so as to furnish cam surfaces for a purpose which will here inafter appear.

The mechanism for determining the number of reciprocations of the carriage beneath each wheel will now be described. ring to Figs. 4 and 5, upon a fixed extension portion of the main frame of the machine is the pattern wheel 84, the cam 85 and the ratchet wheel 86, these three members all being firmly keyed together. The rotation of these elements is effected when the roller 87 is struck by the cam surface on the member 88 which is carried by and fixed to the top of the control rod 33 which, as above riage in either direction The roller 87 to this end is mounted upon the end of the crank member 89 which is loosely ournaled upon the shaft 83 and carries a pawl 90 which engages the ratchet wheel 86. The

crank member89 is returned to normal after advancing the ratchet wheel one'notch, by a spring91, the other end of which is attached to a projecting arm 92 fastened to the main frame of the machine. The pattern wheel 84 previously referred to, is notched on its outward circumference, the number of notches corresponding to the number of teeth in the ratchet wheel 86. It has also in its circumference a deep notch 93. The notches on the pattern wheel 84 are engaged one by one consecutively by a roller 94 mounted upon a lever 95 which is suitably 'by the block 37 fixed to the the latter is carried back and forth by the carriage. (See Fig. 5). When, however, the pattern wheel 84 has been stepped around'so that the roller 94 pulls into the deep notch 93 of the pattern wheel the pin 97 will be lowered and will be engaged by the dagger shaped end of thelever 80 which will be raised vertically far enough to release the catch 81 and permit the spring 78 to traverse the head and tail-stocks into the proper position to effect an engagement of the tubes with the bufiing wheel. It should be under stood that the head'and tail-stock are provided with suitable stops not shown which arrest their lateral traverse at the desired point. When the member 80 returns to the left in its next reciprocation the dagger shaped end thereof passes over the pin- 97 without effect and as soon as the pattern wheel is rotated another notch upon the next reciprocation of the carriage the roller 94 is lifted from the deep notch 93 into one of the shallow notches of the pattern wheel and tern wheel 84 makes another complete rotation. The deep, notch 93 of the pattern wheel also has another function which will now appear. Referring to Fig. 3, 98 is a pivoted arm suitably mounted on the main frame of the machine and carrying'a roller 99 which'engages the notches in the pattern wheel'84, it being maintained in engagement therewith by means ofa spring 98 shown in Fig. 5. The outward end of the lever 98 carries a cam beveled off to form acam 101. 'This cam surface 101 is arranged in such relation that normally, when the roller 99 is in one of the shallow notches of the pattern wheel 84, this cam surface 101 is inoperative; however, the roller 99 enters the deep notch 93 of the pattern wheel the cam surface 101 will be lifted vertically a short distance and placed-within range of the pin 102 carried fore described, the control rod 33. is moved longitudinally a short distance at the end of piece the end of which is- When,

rod 33. As he each stroke of the carriage in each direction.v

When, therefore,

the cam surface 101 is" placed within range of the pin 102 on the the rod 33 remains in the position shown with the member 34 in the notch at the end of the belt shifting lever.

The polishing wheels and 41 are mounted side by side upon the shaft 42 journaled in the column 43 and driven through a pulley 44 from a suitable source of power. The shaft 42 is arranged to slide a certain amount in its ournals to allow for a slight endwise reciprocation provided to allow for changing the wearing zones of the buffing and polishing wheels. In the bottom portion of the column 43 is slidably mounted a shaft 45 which carries an arm 46, the upper end of which is bored out to receive the shaft 42 and fitting between the collars 47 rigidly secured on said shaft. To a boss on the member 45 is attached the tension spring 48, the other end of which is firmly secured to a fixed part of the main frame of the machine. .The end of the shaft 45 butts up against the T-shaped slide 49, which is reciprocated back and forth by a cam mechanism driven by a separate belt and pulley 50, which is fixed to a worm shaft 51, which drives the heart shaped cam 52 in an obvious manner. It should here be noted that the rotation of the polishing and bufling wheels and the reciprocation of the shaft carrying them through the cam mechanism just described is continuous as long as the machine is operating, and is not in any way controlled by the belt shifting mechanism or any of the other auxiliary control apparatus.

Describing the tube mounting arrangement, referring to Fig. 5, 53 represents a plurality of, in this case four, head-stock spindles mounted to rotate in the casting lO-and arranged to drive each other through the small pinions 54. The ends of the spindles are furnished with centers 55 which are of the proper degree of taper to enter and fit the bushings 56 in the ends of the tubes 57 and positively rotate the latter. The other ends of the tubes 57 are carried by similar spindles 58 in the tail-stock casting 13 (see Fig. 6). In this case, however. the spindles 58 are not arranged to be positively rotated. Referring to Fig. 6 it will be seen that each spindle 58 is reduced in diameter for the major portion of its length to admit the insertion of a coiled spring 59 in the space between the reduced portion of the spindle and the bored out hole in the casting 13. The effect of this coiled spring is to apply a considerable amount of pressure to the tube centers and hold the tubes properly in engagement therewith. The release of the tail-stock spindles 58 when the tubes are finished, is accomplished bv means of a pair of upstanding levers 60 which are pivoted on a downwardly extending bracket 61 firmly attached to the under side of the member 13, as shown in Figs. 1 and 3. The

upper ends of these levers are bent away from each other to render them more accessible. It is obvious that when one of the levers 60 is moved longitudinally of the spindles 58 in an outwardly direction it will engage the heads 62 on the ends of the spindles and the pair of tubes controlled by that lever will be released from the centers. The adjustment of the tail-stock for various lengths of tubes is accomplished by means of the handle 63 which clamps the member 12 rigidly upon the rod 9, the upper portion of the member 12 which fits over the rod 9 being split to allow for this clamping efiect, as shown in Fig. 3.

Describing now the mechanism for rotating the tubes, referring to Fig. 5 it will be seen that the casting 11 has a pair of arms projecting to the right of the headstock in which is journaled a shaft 64, to one end of which is firmly attached a block 65 and also carrying a member 66 extending between the two arms of the casting 11 just referred to. As long as the two members 65 and 66 are rigidly attached to the shaft 64 partial rotation of the member 65 will cause a corresponding partial rotation of the member 66. As shown in Figs. 5 and 8, member 65 is arranged to engage a cam surface on the end of the slide 67 which is firmly attached to the main frame of the machine and is so placed that the member 65 will strike the cam surface 68 when the carriage is approaching the limit of its travel toward the right hand side of the machine. The shaft 64 will thus be partially rotated every time the carriage undergoes a complete back and forth reciprocation. lVhen the member 66 is partially rotated it depresses slightly the pin 69 carried by the pivoted plate 70 which rotates one of the spindles 53 through the agency of the pawl 71 and the ratchet wheel 72 which is firmly fiXed to the spindle 53. The cam plate 70 is retracted by the tension spring 73 which also, through the pin 69. lifts the member 66, undue rotation of which is prevented by the stop member 74 fixed t0 the arm of the main casting 11. Owing to the fact that the member 66 eX- tends for a suflici'ent distance parallel with the head-stock slide it will rotate the tubes independently of the position of the headstock casting 10 which is arranged to slide transversely across the casting 11, as will hereinafter appear. .Referring to Figs. 3, 6 and 7 it will be seen that'the head-stock and tail-stock are provided with parallel racks 75 firmly attached to their under sides and projecting through the opening of the slide in the castings 11 and 12. In the two end cast ngs of the carriage, 6 and 7. is journaled a shaft 76 extending the entire length of the carriage and arranged to rotate therein. The right hand end of the,

rod 76 has fixed to it a collar 77 which is engaged by a strong spiral spring 78, theother end of which is fixed to the casting 7. The spring 78 is arranged to be wound up to its fullest extent when the head and tail-stocks are pushed in toward the frame of the machine and the tubes are being operated upon by the polishing wheel 40, the winding up of the spring being accomplished by the pinions 7 9 firmly keyed to the shaft 76 and engaging the racks on the under sides of the head and tail-stocks. The effect of the spring 78 is thus always to tendto rotate the pini'ons 79 in the direction such as to cause the head-stock and tail stock to move outwardly from the field of the polishing wheel 40 into the field of the bufling wheel 41. While the tubes are being operated upon by the polishing wheel this tendency of the stocks to move outwardly is prevented by a T-shaped control lever 801which is loosely pivoted upon the shaft 9. The outward end of. this lever 80 is notched to engage a hook member 81 which is fastened to the head-stock casting 11 a detailed view of this being shown in Fig. 12. Thelever 80 is raised and held up in engagement with the member 81 by a spring 89.. The T-shaped ends of the lever 80 are dagger shaped so as to furnish cam surfaces for a purpose which will hereinafter appear.

The mechanism for determining the number of reciprocations of the carriage beneath each wheel will now be described. Referring to Figs. 4c and 5, upon a fixed extension portion of the main frame of the machine is mounted afixed shaft 83 upon which rotate the pattern wheel 84:, the cam 85 and the ratchet wheel 86, these three members all being firmly keyed together. The rotation of these elements is effected when the roller 87 is struck by the cam surface on the member 88 which is carried by and fixed to the top of the control rod33 which as above described moves longitudinally a certain amount at the end of each stroke of the carriage in either direction. The roller 87 to this endis mounted upon the'end of the crank member 89 which is loosely journaled upon the shaft83 andcarries a pawl 90 which engages the ratchet wheel .86. The crank member 89 is returned to normal after advancing the ratchet wheel one notch, by a spring .91, the other end of which is attached to a projecting arm 92 fastened to the main frame of the machine. The pattern wheel 84 previously referred to, is notched on its outward circumference, the number of notches corresponding to the number of teeth in the ratchet wheel 86. It has also in its circumference a deep notch 93. The notchesonjthe pattern wheel 84 are'engaged one by one consecutively by a roller 94:

'mountedupon a lever 95 which is suitably pivoted upon an extension of the main frame of the machine 96. The long arm of the lever 95 has mounted upon it a pin 97 the purpose of which is to efiect release of normally to be held out of reach of the dagger shaped ends of the T-shaped lever 80 as the latter is carried back and forth by the carriage. (See Fig. 5). When, however, the pattern wheel 84: has been stepped around so that the roller 9 1 pulls into the deep notch 93 of the pattern wheel the pin 97 will be lowered and will be engaged by the dagger shaped end of the lever 80 which will be raised vertically far enough to release the catch 81 and permit the spring 78 to traverse the head and tail-stocks into the proper position to'elfect an engagement of the tubes with the buffing wheel. stood that the head and tail-stock are provided with suitable stops not shown which arrest their lateral traverse at the desired point. When the member 80 returns to the left in its next reciprocation the dagger shaped end thereof passes over the pin 97" without effect and as soon as the pattern wheel is rotated another notch upon the next reciprocation of the carriage the roller 94 is lifted from the deep notch 93 into one of the shallow notches of the pattern wheel and the pin 97 remains inoperative until thepattern wheel 84 makes another complete rotation. The; deep notch 93 of the pattern wheel also has another function which will It should be undernow appear. Referring to Fig. 3, 98 is a pivoted arm suitably mounted on the main frame of the machine and carrying a rcller 99 which engages the notches in the pattern wheel 8 it being maintained in engagement therewith by means of a spring 98, shown in Fig. 5. The outward end of the lever 98 carries a cam piece 100 the end of which is beveled of to form acam 101. This cam surface 101 is arranged in such relation that normally, when the roller 99 is in one of the shallow notches of the pattern wheel 84, this cam surface. 101 is inoperative. l vhen, however, the roller 99'enters the deep notch 93 of the pattern wheel the cam surface 101 will be lifted vertically a short distance and placed jwith'in' range of the pin'102 carried by the block 37 fixed to the rod 33. Asbefore described, the control rodi33 is moved longitudinally a short distance at the end of each stroke of the carriage in each direction. When, therefore the cam surface 101 is placed within range ofthe pin 102 'on the member 37' the latter, when it strikes the cam surface, will rotate the rod 33 slightly and the member 34 (see Fig. 5) will be moved away out of the notch against the action of thevsp'ring 85; This is arranged to takeeffect just at the time when the belt shifting mechanism is in its midway position and the result is that the latter is thus rendered inoperative and the carriage stops. To prevent the overrunning of the carriage to the right of the machine when its reciprocating mechanism is disconnected I provide a brake mechanism shown in Figs. 1 and 3, which consists of a brake drum 103 firmly keyed into the shaft 15. Brake band we is operated by a partial rotation of the shaft 105 journaled in the bracket 106 and bracket 107 on the main frame of the machine. The end of the shaft 105 carries firmly keyed to it a lever 108 the end of which is bent approximately at right angles, as shown in Fig. 1.

The position of the lever 108 is such that when the carriage is released from the reciprocating mechanism by the shifting of the belts onto the two loose pulleys 21 and 22 by the withdrawal of the member 3 1 from the notch in the end of the belt shifting lever, the block 38 in its movement to the right carries the block 37 on the shaft 33 beyond its normal position and the under side of the latter strikes the bent end of the lever 108 and partially rotates the shaft 105, which, as before described, operates the brake mechanism and stops the further movement of the carriage.

As before described, the castings 11 and 12 which carry the head and tail-stocks and which are attached firmly to the shaft 9 are thus pivoted upon the two end castings 6 and 7 of the carriage. Referring to Figs. 3 and 11 it will be noted that the outward ends of the head and tail-members 11 and 12 are supported by the square shaft 109 which connects them together. This shaft 109 has sliding engagement with a slipper member 110 which is carried at the upper end of the rod 111. The slipper member 110 is, itself, journaled in a bracket 112 fixed to the upper end of the rod 111. This is to permit slight rotation of the bushing slipper 110 with relation to the end of the rod 111 for a purpose which will soon appear. Fixed by a set screw on the rod 111 is a collar 113 against which pushes a compression spring 11%: which thus keeps the slipper member 110 all the time bearing up against the square shaft 109 connecting the head and tail-stock members of the reciprocating carriage, the square shaft 109 sliding in said slipper bushing as the carriage reciprocates back and forth. The bushing 110 at its under side is provided with a pin which engages the bracket 112 and prevents the square shaft- 109 from pushing it out of engagement with the bracket 112. The

spring 11 1 only carries part of the weight of the reciprocating carrlage. The balance of the weight 1S'Cil11'16d by the two springs 115 the ends of which engage collars 116 on the shaft 9 their other ends being fixed in the end casting 7 and the intermediate slipper block 6 The springs 115 are so wound as to tend to twist the shaft 9 around in its journals in the castings 6 and 7 and thus rotate the two members 11 and 12 relieving the slipper 110 and the spring 114 of the major portion of the weight of the reciprocat-ory carriage. The combined action of the springs 115 and the spring llet is such as to overcome the weight of the tube supporting structure and press the tubes upwardly against the wheels, the upward movement being limited by the adjusting screw 11 set in the bracket 115 carried by the casting 7. The object of swinging the tube carrying structure upon the rod 9 is to permit the tubes to be lowered slightly during the time that they are being rotated at the end of their travel to the right hand side of the machine and to this end the casting 11 carrying the head stock has mounted upon it a horizontal roller 117 which projects out beyond the end of the member 11 and engages the cam surface 118, (Fig. 1) as the carriage aproaches its limit of movement to the right of the machine. The cam member 119 is supported by a bracket 120 reaching out from the main frame of the machine. The swinging down of the head and tail-stock members carrying the tube is effected for the purpose of preventing a slight scratching of the tubes which might result if they were rotated during the operation of the buffing or polishing wheels upon their surfaces.

As before described, the polishing and buffing wheels rotate upon a shaft supported in bearings in the head of the column 43. This'column may be adjusted up or down to compensate for wear of thewheels or to permit the insertion of difierent size tubes by means of handle 121. The latter is rotatably mounted on the shaft 122 to which is keyed the ratchet wheel 123 arranged to be operated by the spring pawl 124. Shaft 122 is ournaled in the bracket 125 above which is a collar 126 integral with the shaft 122, the upper portion of the shaft 122 has a thread out upon it to fit the member 127 which supports the lower end of the column 43. The latter is prevented from rotating bodily in the main frame by means of a key and feather-way. As hereinbefore stated the machine stops when the reciprocating carriage is at the extreme right hand limit of its movement due to the withdrawing of the dog member 34 from the notch in the end of the belt shifting lever 28. The starting mechanism is shown in Fig. 1 at the base of the machine and comprises an ordinary foot pedal 128 to which is attached a cable 129 passing over a. roller 130 supported on an extension of the main frame of the machine. The end of the cable is fastened to a pin 131 which is fixed in the under side of the belt shifting lever 28 and when the pedal 128 is depressed the lever 28 will be pulled to the right and the carriage will commence to travel toward the left hand side of the ma chine. Before it reaches the limit of its motion the dog member 34 is returned to its position in the notch at the end of the belt shifting lever 28 when the block 37 is struck by the projection on thetail-stock support, the end of the spring 35 being bent out at a suitable angle to prevent interference with its entry into the notch. The machine then continues to reciprocate back and forth in the ordinary manner.

The abradant applying mechanism will now be described. Fastened to the head of 7 terial and is gradually advanced forward by means of the longitudinally extending screw 138 which is threaded into a slipper piece 139 to which the plate 137 is attached and which slides in a slot 140 at the back of the feed box. I The screw 138 is gradually rotated a notch at a time by the pawl 141 carried by the arm 142 andjwhich rotates the ratchet wheel 143 keyed to the end of the'screw shaft 138. The main casting 134 of the feeding mechanism is planed out to receive the dovetailed portion 144 of the feed box which slidesup and down in the casting 134. Referring now to Figs. 2 and 3 it will be seen that to-the top at the under side of the feed box 135 is secured one end of a chain 145 which is attached to the drum 146 keyed to a shaft 147 journaled in the main casting 134. On the other end of the shaft 147 is attached a mechanism shown more clearly in Fig. 11. The sprocket wheel 148 which is made integral withthe drum 149 is free to rotate on the shaft and'does not turn the collar 150 which is fixed firmlj to the shaft unless the dog 151 which slidesin a recessed slot in the drum 149 is pushed away from the sprocket wheel by the spring 152'and into engagement with a slotted'hole 153 in the collar 150. The dog 151has fixed into it a pin 154 which is shown in Fig. 11

as being engaged bythe cam surface of the arm 155 which prevents the dog 151 from entering the slot 153 in the position shown.

The length of the pin 154 issuch that when abradant material is being fed to the polishing wheel it passes below the lever 155 and ices not prevent the dog 151 from entering the slot 1.53. Assuming that the tubes are beingpolished and that abradant material is being fed to the polishing wheel, the arm 155 will be raised so as to permit the passage of the pin 154 below it and the dog 151 will be in engagement with the slot 153 and thus prevent relative rotation of the sprocket wheel 148 and the collar 150. Referring again to Fig. 3, the plate 156 which is fixed to the shaft carrying the cam 52 previously referred to is rotated gradually by a worm gear meshing with'the worm on the shaft 51. In the plate 156 is secured a pin 157 which acts as a crank and to which is attached the link 158. On the sprocket wheel 148 is trained a chain 159 one end of which is rigidly attached to a point on the circumeference of the sprocket wheel and the other end of which passes around the idler pulley 160 and is secured tothe end of the rod 161 attached to the link 158.

When the machine is operating as a polisher and while abradant materialis being applied to the polishing wheel, during portion of its rotation the crank pin 15'7- pulls the chain and through the latter the sprocket wheel 148, and the shaft 147 connected. to the sprocket wheel at that time by the clutch mechanism. described will be thereby rotated in the direction of the arrow (Fig. 2) and will pull down the feed-box 135 through the agency of the drum and chain at the back thereof. A spring 168 one end" of which is attached to the: lower end of the feedbox and having its upper end secured to a bracket on the side of the casting 134, serves to retract the feed-box to its upper position when permitted to do so by the continued rotation 'of the crank pin 157 and thus every revolution of the latter causes an up-and-down movement'of the feed-box. These up-and-d'own reciprocations of the feed-box apply the rod of abradant material to the polishing wheel 40 intermittently and each time the feed-box.

reaches its'lowest position; As the rod of abradant material 1s worn away by its conice 7 tinned intermittent application to the polishing wheel, it is gradually fed forward in the feed-box, this being accomplished when the roller 162 engages the fixed cam plate 163 secured to the back of the casting 134 as the feed-box moves downward as it reciprocates in the casting 134. The arm 142 is returned to its normal position by the spring 164 as the feed-box travels up again. To effect a saving of abradant material it is desirable only to feed the latter to the polishing wheel when the latter is performmounted in the bracket 96 and has at itsing effective work, and to this end I provide lower end a roller which engages the cam surface of the rotary cam 85 which is fixed to and rotates with the pattern wheel 93. The rod 165 is pulled downwardly by a spring 166 and to the upper end thereof is fixed a collar 167 which is pivotally swung within a large aperture in the lever 155 (see Fig. 11). The back end of the lever 155 is pivoted in a bracket 168 secured to the stationary member 133. A close inspection of the cam 85 in Fig. 2 will reveal two surfaces of different radii and subtending different angles. hen the cam is in such a position that the cam surface of large radius is in contact with the lower end of the rod 165 the effect is to raise the lever 15:") so that the pin 15 1 does not engage the cam surface 151 and the sprocket whel 14-8 is thus operative upon the shaft 147 and abradant material is fed to the polishing wheel. However, as soon as the cam surface of small radius of th cam 85 is engaged by the lower end of the rod 165, the latter drops and allows the lever 155 to drop into such a position that upon the next upward movement of the feed-box, due to its retraction in the casting 13 by the spring 168 and consequent oscillation of the shaft 117, the pin 154 strikes and engages the cam surfac 151 and is thus moved longitudinally of the shaft, withdrawing the dog 151 from the slot 153. The sprocket wheel. and its drum 149 are thus disconnected from the carrier 150 and consequently are no longer able to oscillate shaft 1-17, the operation of the abradant feed thus being discontinued. It should. be noted that while the abradant feed is thrown out of operation the feed-box remains sta tionary in its upper position in the casting 13 1 and the rod of abradant material is not in contact with the polishing wheel. The cam 85 is so positioned with reference to the index wheel 81 that the roller 94 on the lever 95 engages the deep notch 93 to trans fer the tubes from the field of one wheel to that of the other shortly after the abradant feed is discontinued, and, preferably, the tubes remain in the field of the polishing wheel for a short time after the abradant feed has been discontinued so that any excess of the abradant material may be used up before the tubes are transferred into the field of the buffing wheel. No automatic feed is needed to supply abradant material to the finishing bufiing wheel 41 as all that is necessary to keep the latter in good condition is to make an occasional manual application of rouge or similar buffing sub stance.

The operation of the machine is obvious in view of the above description, and will be readily understood by those skilled in the art without further amplification.

It is manifest that my machine is capable of being modified considerably to accommodate work of varying character without departing from the spirit of my invention, and I do not limit myself to the construction shown, except as specified in the appended claims.

I claim as my invention 1. In a machine of the class described, the combination of a coarse and a fine abrading member, a plurality of work supports for holding a series of objects to be operated upon contemporaneously by said abrading members successively, and automatic means for transferring the series of objects on said supports from the field of the coarse abrading member to the field of the fine abrading member.

2. In a machine of the class described, the combination of a coarse and a fine abrading member, a series of work supports for holding a plurality of objects to be operated upon contemporaneously, means for successively engaging the entire series of objects on said supports with first the coarse and then with the fine abrading member, and means for effecting a progressive rotation of the objects on said supports.

3. In a machine of the class described, the combination of a coarse and a fine rotary abrading member, a reciprocatory carriage provided with a plurality of work supports for holding the objects to be operated upon, and means for reciprocating said carriage a predetermined number of times with the objects first in engagement with the coarse member and afterward in engagement with the fine member.

I. In a machine of the class described, the combination of a coarse and a fine rotary abrading member, a series of work supports, means for contemporaneously reciprocating a series of objects mounted on said supports successively in the field of each of the said abrading members, and automatic means for transferring the said series of objects simultaneously from the field of the polishing wheel to the field of the bufiing wheel.

5. In a machine of the class described, the combination of a polishing wheel, a buffing wheel, a reciprocatory carriage, a plurality of work supports on said carriage for supporting contemporaneously a series of objects to be operated upon, means for changing the position of the work supports on said carriage, and means for reciprocating the carriage a predetermined number of times with the work on said supports in engagement with first the polishing wheel and afterward the bufiing wheel.

6. In a machine of the class described, the combination of a roughing wheel and a polishing wheel, a series of work supports for holding contemporaneously a series of objects to be operated upon, means for reciprocatlng said series of objects in unison while being operated upon by said wheels,

automatic means for transferring the work from the field of one wheel into the field of the other wheehand automatic means for progressively changing the position of the objects on said supports to present a different surface to be operated upon.

7. In a machine of the class described, the combination of a roughing wheel, a finishing wheel, a reciprocatory carriage, a plurality of rotary work supports on said carriage for holding a plurality of objects to be buffed.contemporaneously, means for reciprocating the carriage a predetermined number of times with the objects while in engagement successively with the roughing Wheel and the finishing wheel, means for transferring the objects out of engagement with the roughing wheel and into the field of the finishing wheel, and means for effecting rotation of the work on said supports.

8. In a machine of the class described, the combination of a roughing wheel, a finishing wheel, a plurality of work supports for holding a series of objects to be operated upon, means for successively reciprocating the work supports in the field of eacn wheel during a predetermined interval, means for rotating the objects on said supports, and means for temporarily rendering the wheels inoperative upon the said objects while rota tion is being effected.

9. In a machine of the class described, the combination of a main frame, a roughing wheel, a finishing wheel, a reciprocatory carriage mounted on the said main frame, supports on said carriage for holding a plu rality of objects to be operated upon contemporaneously, and means for moving said supports across said carriage to transfer the objects from the field of one wheel into the field of the other wheel.

10. In a machine of the class described, the combination of a main frame, a roughing wheel, a finishing wheel, a reciprocatory carriage mounted on said frame, a head and a tail-stock mounted on said carriage for supporting the objects to be operated upon, means for bodily moving said stocks across the direction of travel of said carriage to transfer the objects from th field of one wheel into the field of the other whee 11. In a machine of the class described, the combination of a roughing wheel, a finishin wheel a reciarocator carria e head :3 7 l i t) a and tail-stocks mounted on said carriage for supporting a series of objects to beoperat ed upon, means for simultaneously moving both of said stocks across the direction of travel of said carriage to transfer the objects from the field of one wheel into the field of the other wheel.

12. In a machine of the class described,

the field of one wheel into automatic means for then and tail-stocks mounted on said carriage for supporting a series of objects to be oper ated upon, means for bodily moving said stocks across the direction of reciprocation of said carriage to transfer the objects from the field 0f the other wheel, and means for reciprocating said carriage a predetermined number of times with the objects in the field first of the roughing wheel and then of the finishing wheel.

13. In a machine of the class described, the combination of a main frame, a polish ing-wheel, a bufiing wheel, a reciprocatory carriage mounted on said frame, head and tail-stock members mounted on said carriage for supporting a series of objects to be ope ated upon by the wheels, means for bodily moving said stocks across the direction of travel of said carriage to transfer the en- .tire series of objects simultaneously from the field of one wheel into the field of the other wheel, means for reciprocating the carriage a predetermined number of times with the objects first in the field of the polishingvwheel and second in the field of the V b'ufiing wheel, and means for effecting rotation of the objects during each operating period.

14. In a machine of the class described, the combination of a roughing wheel, arfinishing wheel, a reciprocatory carriage, head and tail-stock members mounted on said carriage for supporting the objects to be oper ated upon, means for bodily moving said stocks simultaneously across the direction of travel of said carriage to transfer the entire series of objects from the field of one wheel into the field of the other wheel, means associated with the head-stool: for rotating the objects at predetermined intervals, and means for reciprocating said carriage a predetermined number of times while the. ob-

jects are in the fields of said wheels.

15. In a machine of the class described,

the combination of a roughing wheel, a finishing wheel, a reciprocatory carriage, head and tail-stock members-mounted on said carriage for supporting the objects to be operated upon, means for bodily moving said stocks across the direction of travel of said carriage to transfer the objects from the field of theroughing wheel into the field of the finishing wheel, means associated with the head-stock for rotating the objects at predetermined intervals, means for temporarily rendering the wheels inoperative on the work while rotation of the objects is being effected, means for reciprocating the carriage a predetermined number of times while the objects are in the field of each wheel, and

arresting the reclprocations of said carriage.

16. In a machine of the class described, the combination of a polishing wheel and a roughing wheel, a reoiprocatory carriage, head and tail-stock members mounted on said carriage for supporting a series of objects to be operated upon by the wheels, means for bodily moving said stocks across the direction of travel of said carriage to transfer the objects from the field of one wheel into the field of the other wheel, and means for rotating said objects independently of the lateral position of the head and tail-stocks on said carriage.

17. In a machine of the class described, the combination of a polishing wheel, a buffing wheel, a main frame, a reciprocatory carriage mounted on said frame, head and tail-members mounted on said carriage, head and tail-stocks slidably mounted on the head and tail-members, a spring normally tending to pull the head and tail-stocks in a direction to carry the objects from the field of the polishing wheel into the field of the buiiing wheel, a catch member for preventing said movement, and means for automatically releasing said catch member after a predetermined number of reciprocations of the objects in the field of the polishing wheel.

18. In a machine of the class described, the combination of a main frame, a roughing wheel, a finishing wheel, a reciprocatory carriage mounted on said frame, head and tail-members mounted to swing on said carriage, head and tail-stocks bodily movable on said head and tail members for supporting the objects to be operated upon by the Wheels, means tending to pull the head and tail-stocks to transfer the objects from the field of the roughing wheel into the field of the finishing wheel, a catch member for preventing said movement, means for reciprocating said carriage with the objects in the field of the roughing wheel a predetermined number of times, and means for then effecting the release of said catch member to allow movement of the objects into the field of the finishing wheel, means for rotating the objects, and means for arresting the reciprocations of the carriage after a predetermined interval.

19. In a machine of the class described, the combination of a roughing Wheel, a finishing wheel, a reciprocatory carriage, a head and tail-stocks slidably mounted on said carriage, a spring operated rack and pinion mechanism for simultaneously moving the head and tail-stocks laterally across the carriage to transfer the objects from the field of the roughing wheel into the field of the finishing wheel, and means for rendering effective said rack and pinion mechanism after a predetermined number of reciprocations of the objects in the field of the polishing wheel.

20. In a machine of the class described, the combination of a coarse and a fine abrading member, a plurality of substantially parallel pairs of supports for holding a series of tubes to be operated upon contemporaneously and successively by said abrading members, means for elfecting relative motion between said abrading members and said series of tubes in a direction parallel with the axis of said tubes, means for rotating said tubes while in the fields of said abrading members, and means for simultaneously transferring the entire series of tubes from the field of one wheel into the field of the other wheel.

21. In a machine of the class described, the combination of a pair of abrading members, a plurality of tube supports for holding a series of tubes to be operated upon contemporaneously by said abrading members, and means for operating simultaneously upon the tubes carried by said supports first with one and then with the other abrading member.

JOHN F. GAIL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

